87211894 has 16 divisors (see below), whose sum is σ = 163097856. Its totient is φ = 33978600.

The previous prime is 87211867. The next prime is 87211933. The reversal of 87211894 is 49811278.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283002 + ... + 283309.

It is an arithmetic number, because the mean of its divisors is an integer number (10193616).

Almost surely, 2^87211894 is an apocalyptic number.

87211894 is a deficient number, since it is larger than the sum of its proper divisors (75885962).

87211894 is a wasteful number, since it uses less digits than its factorization.

87211894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566331.

The product of its digits is 32256, while the sum is 40.

The square root of 87211894 is about 9338.7308559568. The cubic root of 87211894 is about 443.4642070637.

The spelling of 87211894 in words is "eighty-seven million, two hundred eleven thousand, eight hundred ninety-four".